Riders are sent off at one minute intervals. If the time trial starts at 7pm, the first rider is away at 7.01pm, and so on. If you are, for example, number 17, you will start time is 7.17pm.
As your start time approaches, line yourself up in order with the other riders. As the rider in front of you goes off, move forward. When you are ready, you’ll be supported in position so you can clip in. You will have a countdown 30, 15, 10, 5, 4, 3, 2, 1, Go.
There are marshals at junctions that require them, with signs to alert other vehicles that a cycle event is happening.
However, you should acquaint yourself with the course and the marshal is NOT there to stop the traffic for you. It is up to you to follow the rules of the road and stay safe.